Thread: Simple code compiles in windows, does not in xCode.

Hi all,

I'm in the early stages of learning C, and I want to develop on OSX. I wrote a simple program that uses fopen() on a .txt file (in the local directory of the source.c file) and uses fscanf() to read the first line into an integer.

It works fine using codeblocks in a windows environment, but it doesn't work on any ide I've tried on OSX. It returns "Segmentation Fault: 11". What am I missing?

Code:

#include <stdio.h>

int main ()
{
    int num = 0;
    FILE *fpointer;
    fpointer = fopen("test.txt", "r");
    fscanf(fpointer, "%d", &num);
    printf("%d\n", num);
    
    return 0;
}

Originally Posted by Salem

You're missing a
if ( fpointer == NULL )
to check to see if you opened the file successfully (or not).

Gotcha, fopen definitely isn't populating that pointer. But why wouldn't it? test.txt is in the local directory of the source.c.... does OSX not work that way?